The play Henderson made against Michigan in the bowl game was one of the most incredible plays I've ever seen a DT make. Just athleticism and size like no other.
Henderson was not just very big but incredibly strong. Nobody could bring the inside bull rush like that guy--he'd push the one or two linemen blocking him (or trying to) back into the face of the QB as he was trying to throw. I spoke to him at length one day at UT--very nice guy.